Has anyone got a Transmitted Color Map to work?

Flortale

Has anyone got a Transmitted Color Map to work?

I need to control the strength of the transmitted color in certain areas, but when I set a map, it seems to have no affect whatsoever. In some places where the skin protrudes out, the skin becomes more red in those areas, but with a Transmitted Color Map map I can control how much of the color shows in that area.

barbult

It never has worked, and is unsupported by Iray, as far as I know. Here is an old message about the issue.

Flortale

barbult said:

It never has worked, and is unsupported by Iray, as far as I know. Here is an old message about the issue.

Wait, so greyscale maps do work, but color maps don't?  Now that I think about it, if greyscale maps work, that's all I need. I just need to control the strength of the transmitted effect in certain areas.

I may have phrased my question wrong. I just need any map to work, whether greyscale or color.

vwrangler

Flortale said:

barbult said:

It never has worked, and is unsupported by Iray, as far as I know. Here is an old message about the issue.

Wait, so greyscale maps do work, but color maps don't?  Now that I think about it, if greyscale maps work, that's all I need. I just need to control the strength of the transmitted effect in certain areas.

I may have phrased my question wrong. I just need any map to work, whether greyscale or color.

No, that's not what I said in that post, and it's not what Rob said in his post.

To the best of my knowledge, no maps work in the Transmitted Color slot. As rbtwhiz put it, "Iray Photoreal only supports uniform (i.e., non-mapped) values (refer again to the quoted excerpt from the Iray Programmer's manual)". (I thought they were going to remove that slot to get rid of confusion, several versions ago, but that never happened.)

I don't know how you can control it the way you want. The best guess I have is that you might want to try a grayscale map in the Translucency Strength slot.

 

Flortale

vwrangler said:

Flortale said:

barbult said:

It never has worked, and is unsupported by Iray, as far as I know. Here is an old message about the issue.

Wait, so greyscale maps do work, but color maps don't?  Now that I think about it, if greyscale maps work, that's all I need. I just need to control the strength of the transmitted effect in certain areas.

I may have phrased my question wrong. I just need any map to work, whether greyscale or color.

No, that's not what I said in that post, and it's not what Rob said in his post.

To the best of my knowledge, no maps work in the Transmitted Color slot. As rbtwhiz put it, "Iray Photoreal only supports uniform (i.e., non-mapped) values (refer again to the quoted excerpt from the Iray Programmer's manual)". (I thought they were going to remove that slot to get rid of confusion, several versions ago, but that never happened.)

I don't know how you can control it the way you want. The best guess I have is that you might want to try a grayscale map in the Translucency Strength slot.

 

I need the translucent effect to still be there, or else that part of the skin will look like a mannequin. I want 0.8 translucency on all the skin, but  I need to control the transmitted color in certain parts so the hyopthetical blood underneath isn't so prominent. I probably need to use a map somewhere else maybe? Maybe I need to fix the problem in the translucency color map under base surface settings. Perhaps just desaturate that area to lessen the blood underneathe effect.

I'll investigate further, but for now it seems I might ahve to fix the problem in the render via photoshop.